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Borrowed from Latin coruscātiōnem, coruscātiō (glitter, flash).



coruscation (countable and uncountable, plural coruscations)

  1. A sudden display of brilliance; a flashing of light; a sparkle.
    • 1837, Thomas Carlyle, The French Revolution: A History [], volume (please specify |volume=I to III), London: Chapman and Hall, OCLC 1026761782, (please specify the book or page number):
      [I]n the dusky galleries, duskier with unwashed heads, is a strange 'coruscation,'—of impromptu billhooks.
    • 1838, L[etitia] E[lizabeth] L[andon], Duty and Inclination, volume II, London: Henry Colburn, page 85:
      The one, as a brilliant coruscation playing in a summer sky, might enchant the fancy and ensure the suffrage of a moment; the other, as a lovely constellation, though less vivid, yet from its undeviating steadfastness never failed to leave upon the observer impressions more truly gratifying, solid, and lasting.
    • 2001, Oliver Sacks, Uncle Tungsten: Memories of a Chemical Boyhood, Alfred A. Knopf (2001), 6,
      All of these things—the rubbed amber, the magnets, the crystal radio, the clock dials with their tireless coruscations—gave me a sense of invisible rays and forces, a sense that beneath the familiar, visible world of colors and appearances there lay a dark, hidden world of mysterious laws and phenomena.

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